Magnetic apparatus.



No. 824,812. PATENTED JULY 3, 1906.

H. R. PLIMPTON, 2D. MAGNETIC APPARATUS.

APPLIUATION FILED FEB. 25, 1904.

A TTOHNE YS NITED"I SA. ES PATENT. hlllillCE..

HENRY RICHARDSON lLlh/TON, 2D, 0F NEWTN CENTER, MASSA- CHUSETTS.

Mannini-io nement-us.

No. seriele.k

Specication of Letters'atent.

Patented July 3, 1906.

Application filed February 25,1904. Serial No. 195.177-

To all whom it may concern;

Be it known that I, HENRY RICHARDSON PLrMPToN, 2d, a citizen oi the United States, and a resident oi Newton Center, in the county of Middlesex and State oi Massachusetts, have invented a new and improved Magnetic Apparatus, of which the following is a full, clear, and exact description.

The invention relates to a novel magnetic apparatus; and the object of the inventionis Ito demonstrate in a new manner and by new ing drawings, forming a part ci this specifica-y tion, in which similar characters of reierence indicate corresponding parts inall the iigures.

Y Figure l is a perspective view oi an upright steel rod and the improved magnet so placed thereon as to automatically take a spiral course around the rod without departing from engagement with the rod. llig. 2 is a perspective view of an inclined plane and ktwo magnets placed thereon in attracting position, where one serves Aas a bralre to the other, both remaining stationary on the inclined plane at such time. Fig. 3 is an end view ci the improved magnet made in one piece. Fig. l is a longitudinal section 'through the magnet shown in Fig. 3, the section being talren on the line Ll of `Eig. 3. Fig. 5 is an end view oi the magnet in which the magnet is secured to the roll-heads. Fig.

' 6 is a longitudinal section through the magnet shown in l? ig. 5, the section being talren practically on the line 6 6 ci Fig. 5. Fig. 7 is an end view of the form ci magnet shown in the preceding iigures, but presenting a slight departure in the manner oi connecting the roll-heads with the body. AEig. 8 is a longitudinal section talren'substantially on the line 8 8 oi 7Eig. 7. TEig. 9 is an end view oi the magnet having its heads made oi spirally wound or coiled wire, and Fig. l0 is a longitudinal section taken practically on the line l() ill oi Fig. 9.

Under all conditions of construction the body portions of the bar-magnets are provided with roll-shaped ends or heads constituting pole-pieces, and I desire it to be understood that such bar-magnets may be'varied in form or size or may be composed of one or more parts without departing from vthe spirit of the invention, which is to provide means whereby bar-magnets may be made to revolve or rotate on their axes through the medium oi roll-shaped heads, ends, or pole-pieces.

ln the form oi construction shown in Figs. l, 2, 3, and l the bar-magnet consists of a body 10 circular in cross-section; but it may have other cross-sectional shape and rollheads or pole-pieces ll and l2 of greater diameter than the body, so that the body is held from engagement with any support on which the magnet may be placed. The heads or pole-pieces are termed roll heads or .ends," as they enable the bar-magnet to turn or revolve on its axis by their means.

Under the iorm of construction shown in Figs. 5 and 6 the same result is obtained but the body 13 of the magnet is polygonal in cross-section and is fitted in corresponding openings la in the central portion of the rollheads, ends, or pole-pieces l5 and 16.

The form oi the barmagnet shown in Figs. 7 and 8 is practically the same as that illustrated in Figs. 5 and 6, both forms being made in sections, and the only difference resides in the fact that the body 17 oi the magnet shown in Figs. 7 andI 8 is round in crosssection and is let into and secured in circular openings i8 in the roll heads, ends, or polen pieces 19 and 20.

With reference to the'construction shown in Figs. 9 and l0 the body 21 of the magnet is shown round in cross-"section, although it .may be otherwise formed, the feature oi this particularv bar-magnet being that the roll heads, ends, or pole-pieces 22 and 23 are composed or spirally-wound wire round or dat in cross-section.

With reference to lig. l, one of the rollshaped magnets A is shown with its roll heads, ends, or pole-pieces in engagement with an upright rod B oi suitable metal, the

body oi the bar-magnet being diagonal with respect to the rod, and after the improved magnet is thus placed and released the mag'- net, with its rollmcnds, will revolve around and run down the rod in a spiral course by l the force of gravity pulling downward and magnetism holding the revolving bar-magnet piece to the said rod through the medium of its roll ends.

In Fig. 2 I have shown two of the improved roll-magnets (designated as C) vlocated upon an inclined plane D withopposite poles presented, so that the said magnetic rolls attract one another, forming a magnetic brake, permitting or compelling the two roll-magnets to remain stationary on the inclined plane upon which either magnet separately would rapidly travel down. When like poles are presented and the roll-shaped magnets are placed on a level surface, the magnets will rapidly repel or push each other apart.

When unlike poles are'presented, either roll will attract or lift the other.

In this new form of magnetic apparatus with roll-shaped ends or pole-pieces the magnetic lines of force emanate radially from theV toy'it is useful in demonstratingboth the re.

pelling. and attracting power of such magnets in a new manner not possible withusual magnets of horseshoe' or plain bar form.

Having thus described my invention, I claim as new and desire to secure by Letters Patent` 1. In a magnetic apparatus, a support, and

magnets having roll-shaped ends' or polepieces for engaging with the support, thev magnets being free to revolve on theiry axes'.-

2. In a magnetic apparatus, a support, and a bar-magnet comprising a straight body of desired cross-sectional 'shape' and roll-shaped ends or pole-pieces at the ends of the body of greater diameter than the body and adapted to engage the support to permit the magnet to revole on its axis.

3. In a magnetic apparatus, a support, and a bar-magnet having a straight body portion and roll-shaped ends or pole-pieces at opposite ends of the body, and connected at their centers with the'ends of the body, the rollshaped end pieces forming continuous circular poles, adapted to engage the support, the magnet being freeto roll in contact with said support.

4. magnetic apparatus comprising a rod of metal, and a magnet having roll-shaped ends for engagement with 'the rod to cause the magnet under the action of gravity J(prevolve around and run down the rod, as described. v f

5. A magnetic apparatus comprising an upright rod of metal, and a magnet having a body portion arranged diagonally with respect'to the rod, and roll-shaped ends of f greater diameter than the bodyfor enga ement with the rod to cause the magnet un er the force of gravity to revolve around and run down the rod in a spiral course, as set forth.

In testimony whereof I have signed my name to this specification in` thegpresence of two subscribing witnesses.

HENRY RICHARDSON PLIMPTON, 2D Witnesses:

JAMES L. PLIMPTON, EDITH ALBEN PLIMPTON. 

